I liked the boss. I got stuck at the third level cos I couldn't dash? Lol. Anyway it was a fun experience. I love how there's not limit to the shooting. It makes the game feel really aggresive.
I think animations for jumping and landing would have been nice since the character looks quite weighty.
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Have you tried this updated version with some bug fixes? https://akusan.itch.io/aether-knights-post-jam
More bug fixes are on the way!